Authorities have identified the four people who were killed when a plane crashed into two Connecticut homes Friday. East Haven Police formally confirmed that the the pilot of the small, propeller-driven plane was 54-year-old former Microsoft executive Bill Henningsgaard. Henningsgaard was flying with his 17-year-old son Maxwell, who also died in the crash. Sade Brantley, 13, and 1-year-old Madisyn Mitchell, who lived in one of the East Haven homes hit by the plane, were killed as well.

Henningsgaard's brother Blair, the city attorney in Astoria, said Bill Henningsgaard and his son were traveling the East Coast to visit colleges, and Connecticut was part of the itinerary. Blair Henningsgaard said the family learned it was Bill Henningsgaard's plane through the tail number.

Investigators say they've found no obvious signs there was anything wrong with the plane. Federal safety investigator Patrick Murray said at a news conference Saturday in New Haven that he would have a preliminary report within 10 days but it would be months before a final determination is made of the cause of Friday's accident.

He said the plane landed upside down at an angle on two East Haven homes as the pilot was apparently turning to land at Tweed New Haven Airport in rainy weather.